<?php
namespace Illuminate\Pagination;
use ArrayAccess;
use Countable;
use Illuminate\Contracts\Pagination\LengthAwarePaginator as LengthAwarePaginatorContract;
use Illuminate\Contracts\Support\Arrayable;
use Illuminate\Contracts\Support\Jsonable;
use Illuminate\Support\Collection;
use IteratorAggregate;
use JsonSerializable;
class LengthAwarePaginator extends AbstractPaginator implements Arrayable, ArrayAccess, Countable, IteratorAggregate, Jsonable, JsonSerializable, LengthAwarePaginatorContract
{
/**
* The total number of items before slicing.
*
* @var int
*/
protected $total;
/**
* The last available page.
*
* @var int
*/
protected $lastPage;
/**
* Create a new paginator instance.
*
* @param mixed $items
* @param int $total
* @param int $perPage
* @param int|null $currentPage
* @param array $options (path, query, fragment, pageName)
* @return void
*/
public function __construct($items, $total, $perPage, $currentPage = null, array $options = [])
{
$this->options = $options;
foreach ($options as $key => $value) {
$this->{$key} = $value;
}
$this->total = $total;
$this->perPage = $perPage;
$this->lastPage = max((int) ceil($total / $perPage), 1);
$this->path = $this->path !== '/' ? rtrim($this->path, '/') : $this->path;
$this->currentPage = $this->setCurrentPage($currentPage, $this->pageName);
$this->items = $items instanceof Collection ? $items : Collection::make($items);
}
/**
* Get the current page for the request.
*
* @param int $currentPage
* @param string $pageName
* @return int
*/
protected function setCurrentPage($currentPage, $pageName)
{
$currentPage = $currentPage ?: static::resolveCurrentPage($pageName);
return $this->isValidPageNumber($currentPage) ? (int) $currentPage : 1;
}
/**
* Render the paginator using the given view.
*
* @param string|null $view
* @param array $data
* @return \Illuminate\Contracts\Support\Htmlable
*/
public function links($view = null, $data = [])
{
return $this->render($view, $data);
}
/**
* Render the paginator using the given view.
*
* @param string|null $view
* @param array $data
* @return \Illuminate\Contracts\Support\Htmlable
*/
public function render($view = null, $data = [])
{
return static::viewFactory()->make($view ?: static::$defaultView, array_merge($data, [
'paginator' => $this,
'elements' => $this->elements(),
]));
}
/**
* Get the paginator links as a collection (for JSON responses).
*
* @return \Illuminate\Support\Collection
*/
public function linkCollection()
{
return collect($this->elements())->flatMap(function ($item) {
if (! is_array($item)) {
return [['url' => null, 'label' => '...', 'active' => false]];
}
return collect($item)->map(function ($url, $page) {
return [
'url' => $url,
'label' => (string) $page,
'active' => $this->currentPage() === $page,
];
});
})->prepend([
'url' => $this->previousPageUrl(),
'label' => function_exists('__') ? __('pagination.previous') : 'Previous',
'active' => false,
])->push([
'url' => $this->nextPageUrl(),
'label' => function_exists('__') ? __('pagination.next') : 'Next',
'active' => false,
]);
}
/**
* Get the array of elements to pass to the view.
*
* @return array
*/
protected function elements()
{
$window = UrlWindow::make($this);
return array_filter([
$window['first'],
is_array($window['slider']) ? '...' : null,
$window['slider'],
is_array($window['last']) ? '...' : null,
$window['last'],
]);
}
/**
* Get the total number of items being paginated.
*
* @return int
*/
public function total()
{
return $this->total;
}
/**
* Determine if there are more items in the data source.
*
* @return bool
*/
public function hasMorePages()
{
return $this->currentPage() < $this->lastPage();
}
/**
* Get the URL for the next page.
*
* @return string|null
*/
public function nextPageUrl()
{
if ($this->hasMorePages()) {
return $this->url($this->currentPage() + 1);
}
}
/**
* Get the last page.
*
* @return int
*/
public function lastPage()
{
return $this->lastPage;
}
/**
* Get the instance as an array.
*
* @return array
*/
public function toArray()
{
return [
'current_page' => $this->currentPage(),
'data' => $this->items->toArray(),
'first_page_url' => $this->url(1),
'from' => $this->firstItem(),
'last_page' => $this->lastPage(),
'last_page_url' => $this->url($this->lastPage()),
'links' => $this->linkCollection()->toArray(),
'next_page_url' => $this->nextPageUrl(),
'path' => $this->path(),
'per_page' => $this->perPage(),
'prev_page_url' => $this->previousPageUrl(),
'to' => $this->lastItem(),
'total' => $this->total(),
];
}
/**
* Convert the object into something JSON serializable.
*
* @return array
*/
public function jsonSerialize()
{
return $this->toArray();
}
/**
* Convert the object to its JSON representation.
*
* @param int $options
* @return string
*/
public function toJson($options = 0)
{
return json_encode($this->jsonSerialize(), $options);
}
}